The saying "they don't make them like they used to" is so true. Decades ago, the manufacturing process was so loose, they'd have three different piston sizes for one engine, A B and C. After the block was bored, they'd measure the bores and assign a size to it, either A B or C. Then they'd match the piston to that bore to ensure a proper fit. That's making three different parts to fit one hole, simply because the boring process wasn't accurate enough. Wow! Today, they can put that investment into superior metallurgy, better production processes, and more sophisticated designs.